Shuttle-operating mechanism for embroidering-machines



HLSAURER.

SHUTTLE OPERATING MECHANISM FOR EMBROIDERING MACHINES.

APPLICATION FILED NOV-7,1919.

Patented July 20, 1920.

WITNESS PATENT OFFICE.

HIPPOLYT SAURER, 0F ARBON, SWITZERLAND.

SHUTTLE-OPERATING MECHANISM FOR EMBROIDERING-MACHIN'ES- I Specification of Letters Patent.

Application filed November 7, 1919. Serial No. 336,433.

To all whom it may concern Be it known that I, HIrroLrT SAURER, a

citizen of the Republic of Switzerland, residing in Arbon, Switzerland, have inventedaccompanying drawings, forming a part hereof.

In shuttle embroidering machines the shuttles are usually mounted in raceways which are inclined somewhat with respect to the vertical and are reciprocated therein, for. the purpose of causing the shuttles and the shuttle threads to pass through the loops of the needle threads, by pins which are carried by a horizontal bar to which the necessary reciprocations in a substantially vertical direction are imparted by suitable mechanism. Each shuttle is actuated by two pins, one of which is below the shuttle and the other above it. When the shuttle thread gives out the shuttle must be removed from the raceway in order to permit a new bobbin to be inserted, and forthis purpose the upper pin'is movable longitudinally with respect to the shuttle operating bar so that the shuttle can be removed through the upper end of the raceway. Such removals must be effected frequently with the result that there is more or less wear between the shuttle actuating pin and the shuttle operatingbar and that, when the pin ismounted, as usual, in a rectangular groove in the upper side 'of the shuttle operating bar, in which it is held by, the pressure of a spring clip, there is eventually developed a looseness or freedom for lateral motion of the pin in .its groove. Such looseness or lateral motion may be comparatively slight at the bar, but at the end of the pin, where it co-acts with the shuttle, such looseness becomes relatively considerable, so that the pins do not cooperate prop: erly with the shuttles and the latter are impeded in their free movement in the raceways. Furthermore, the pins, by reason of such looseness, sometimes bear against the shuttles in the upward movement of. the shuttles, so that there is not always provided between the upper pin and the shuttle the clearance which isnecessary to permit the shuttle to pass through the loop of the needle thread without jamming, which results in the breaking of the needle thread. It is the obj ect'ofthis invention to overcome the difficulties mentioned and to provide for such a bearing of each upper pin on the shuttle operating bar that the wear between the pin and the bar shall be taken up automatically and the development of such looseness of the pin in its hearing as to permit lateral movement of the pin at its shuttle actuating end be prevented. In accordance with the invention there is provided between each pin and the bar a bearing surface which is relatively oblique with respect to the vertical so that, as wear takes place, the pin is nevertheless pressed at all times tightly against the operating bar by its cooperating spring clip and is thereby held from lateral movement, whereas, if the pin is mounted in a rectangular roove, with its side walls vertical, as heretofore, the wear between the pin and such vertical, walls is not compensated for and looseness of the pin results therefrom. It will be seen, as this'description proceeds, that the oblique surface between the pin and the bar can be provided in various ways and can be either plane or curved and that the pin, variously formed, can be made to lie in a groove of the bar, also variously formed, or that the pin might be formed with a longitudinal groove to cooperate with a suitably formed rib on the bar. The invention will be more fully explained hereinafter with reference to the accompanying drawing in which it is illustrated and in which- Figure l is a detail view in cross-section showing the old method of mounting the shuttle actuating pin in a rectangular groove in the shuttle operating bar. I

Fig. 2 is a view mainly in elevation but partly in section showing so much of the shuttle operating mechanism of an embroidering machine as is necessary to enable the application of the invention thereto to be understood, one embodiment of the invention being illustrated in this figure.

Fig. 3 is a view in section on the plane indicated by the broken line III-III of Fig. 2, but on a larger scale.

Fig. 4; is a detail view in section on the plane indicated by the broken line IV-IV of Fig. 3, but on a still larger scale, illus trating the particular embodiment of the invention indicated in Fig. 2.

Figs. 5, 6, 7, 8 and 9 are views similar to Fig. 4, but showing other embodiments of the invention.

The upper and lower shuttle pins 1 and 17 are secured, in the improved construction as Patented July 20, 1920.

'play of the pin can be developed.

well as in the old construction, to a shuttle operating bar 3, which is mounted, by means of swlveled clips 11, upon reciprocating rods,

one of which is shown at 12, guided in suitably inclined guides 13. The lower bar 3 is connected by a link 1 1 with one arm of a hell I crank lever 15 to which an oscillating movement is imparted from suitable mechanism through a rod 16 to eflect the substantially vertical reciprocations of the shuttle operat-.

move the corresponding shuttle from the raceway,asfor the purpose of inserting a filled bobbin. For this purposeeach-upper pin is held to its seat on the operating bar 3 by a screw 1'? and a spring clip 18. lleretofore each upper pin 1 has been made rectangular in cross-section and seated in the rectangular groove 2 of the upper end of thebarv 3,-as indicated in Fig. 1. In this construction whatever looseness isdeveloped between the pin and the bar, due to wear occasioned by frequent moving of the pin in its groove, is not-in any way compensated forby the pressure of the spring clip 18 and eventually considerable looseness or lateral play of the pin with respect to the bar is developed and undesirable results follow as hereinbefore explained.

By the present invention each upper shuttlev actuating pin is so mounted on the shuttle operating bar that wear between the pin and the bar is constantly and automatically compensated for and no looseness or lateral This result is accomplished by providing between the pin and the bar a bearing surface which is oblique .with respect to the vertical, so that, as wear takes place, the pin and bar are always pressed together at such oblique bearing surface by the spring clip or holding meansand no looseness can develop. Such obliquebearing surface can be provided in various ways. As shown in Fig. l, the pin 1 is slightly flattened, as at 7, and the groove 2, having one vertical side wall 4: andahorizontal bottom 1 surface 5, is formed with an oblique bearing surface 6 with .which the flattened surface 7 of the pin. cooperates, the pin also bearing, as at 8, against the vertical face 1. It will be seen that the downward pressure of the holding means, such as the spring clip 18, presses the pin always. closely against the oblique bearing surface at 6, so that wear between.

the pin and the bar, whether it be wear of the pin or wear of the bar, is always compensated for and the development of looseness bet veen the pin and the bar is prevented. V

The pin; 1 might remain circular in crosssection and restin a groove 2?. which is vshaped in section, as shown in Fig. 5, or, as shown in Fig. 6, the round pin 1 might have two faces flattened, as at .19 and 2t and rest inthe groove 2 which is V-shaped in cross-section. Again, as shown in Fig. 7, the pin 1 which is rectangularin crosssection, might have its lower edges beveled off and rest in the groove 2 with. correspondingly i clined sides, as'at 21, 22. The same result might be accomplishedby permitting the pin 1, circular incross-section, to rest in a rectangular groove 2 the width of which is less than the diameter .of the pin, so that the relatively oblique surfaces of the pin rest against the edges of the groove 2, as shown at 24c, 25 in Fig. 8. Y i

In each .of'the constructions above .re ferred to the groove is formed in the bar, but the desired oblique bearing surface might be provided, as shown in Fig. 9, by forming r v-shaped rib 23 for cooperation with a correspondingly shaped groove 26 in the underside of the pin 1 In all 'of the illustrated embodiments of the invention, as in others which will suggest themselves, there is providedon either the. pin or'the bar, or on e ach xa relatively oblique bearing surface, so that the pin holding means,.s uchasthe spring clip 18, always presses the two parts closely together and, compensates-for wear of. one part with respect to the other and thereby the development of zloosenes's between the two parts is prevented, p

I claim as my invention:

I 1. In a shuttle operating mechanism for an embroidering machine, the combinationof a longitudinally movable shuttle was ingpin, ashuttle operating bar, and means to press the pin against the bar, the pin and the bar having a relatively oblique bearing surface, the one against the other, whereby, as the pin'and bar become worn at their bearing surface, the pin is pressed closely against the bar and relative lateral. movement of the pin is prevented.

2. In a shuttle operating mechanism for an embroidering machine, the combination of a'longitudinally movable shuttle actuatingpin, a shuttle operating bar, and .a spring clip to press the pin against the bar, the pin and the bar having arelatively oblique 7 bearing surface, the one against the other, whereby, as the pin andbar become worn at their bearing surface, the pin is pressed closely against the bar andrelative' lateral movement of the pin is prevented] 3. In a shuttle operatingimechanism for an embroidering machine, the combination of a longitudinally movable shuttle actuating pin, a shuttle operating bar grooved to receive the pin, and means to press the pin into the groove, the pin and the bar having a relatively oblique bearing surface, the one against the other, whereby, as the pin and bar become worn at their bearing surface, the pin is pressed closely against the bar and relative lateral movement of the pin is prevented.

4. In a shuttle operating mechanism for an embroidering machine, the combination of a longitudinally movable shuttle actuating pin, a shuttle operating bar having a groove with an inclined side to receive the pin, and means to press the pin into the groove, whereby, as the pin and bar become worn, the pin is pressed closely against the inclined side of the groove and relative lateral movement of the pin is prevented.

In a shuttle operating mechanism for an embroider-ing machine, the combination of a longitudinally movable shuttle actuating pin, a shuttle operating bar having a groove with two inclined sides, and means to press the pin into the groove against the inclined sides, whereby, as the pin and bar become worn at their bearing surface, the pin is pressed closely against the bar and relative lateral movement of the pin is prevented.

This specification signed this 8 day of October A. D. 1919.

HIPPOLYT SAURER. 

